vmlaq in arm_dot_prod_f32 instead of vmulq and vadd

Source/BasicMathFunctions/arm_dot_prod_f32.c

@@ -72,7 +72,7 @@ void arm_dot_prod_f32(
     float32x4_t vec1;
     float32x4_t vec2;
     float32x4_t res;
-    float32x2_t accum = vdup_n_f32(0);
+    float32x4_t accum = vdupq_n_f32(0);    
 
     /* Compute 4 outputs at a time */
     blkCnt = blockSize >> 2U;
@@ -85,8 +85,7 @@ void arm_dot_prod_f32(
         /* C = A[0]*B[0] + A[1]*B[1] + A[2]*B[2] + ... + A[blockSize-1]*B[blockSize-1] */
         /* Calculate dot product and then store the result in a temporary buffer. */
         
-        res = vmulq_f32(vec1, vec2);
-        accum = vadd_f32(accum, vpadd_f32(vget_low_f32(res), vget_high_f32(res)));
+	accum = vmlaq_f32(accum, vec1, vec2);
 	
         /* Increment pointers */
         pSrcA += 4;
@@ -98,7 +97,12 @@ void arm_dot_prod_f32(
         /* Decrement the loop counter */
         blkCnt--;
     }
-    sum += accum[0] + accum[1];
+    
+#if __aarch64__
+    sum = vpadds_f32(vpadd_f32(vget_low_f32(accum), vget_high_f32(accum)));
+#else
+    sum = (vpadd_f32(vget_low_f32(accum), vget_high_f32(accum)))[0] + (vpadd_f32(vget_low_f32(accum), vget_high_f32(accum)))[1];
+#endif    
 
     /* Tail */
     blkCnt = blockSize & 0x3;